illegal instruction (CPU mismatch)

Markus Trippelsdorf markus@trippelsdorf.de
Wed Sep 21 19:04:00 GMT 2016


On 2016.09.21 at 17:48 +0000, Mahmood Naderan wrote:
> OK guys...
> (gdb) x/i $pc
> => 0x8fdb6e <zdot_kernel_8+334>:        vfmadd231pd %xmm8,%xmm12,%xmm0
> 
> So, the instruction is vfmadd231pd 
> 
> Any idea?

It is an FMA3 instruction. See:
https://en.wikipedia.org/wiki/FMA_instruction_set

-- 
Markus



More information about the Gcc-help mailing list